392 



CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 



No. 10100. 



No. 10108. 



10084. PAPER THICKNESS GAGE, standard, for use with any paper from tissue to heaviest card-, 

 board. Heads thickness direct upon dial in thousandths of an inch, up to 0.3 inch, without 

 danger of error $35.00 



10086. PAPER THICKNESS GAGE, pocket type, in leather covered case which fits the pocket. Heads 



to 0.3 inch in thousandths 17.50 



For other PAPER TESTERS, sec Testing Machines. 



PARAFFINE BATHS AND OVENS 



10100. PARAFFINE BATH, simple form, made of polished copper, 7 inches long, 3% inches wide, and 

 3% inches deep, with extra sheet iron bottom and iron base 5 inches high. It is provided 

 with a space for heating slides, and two nickel-plated cups. The shallow cup is 2% inches 

 in diameter and % inch deep, watch glass shape, and the deep one is 2% inches in diameter 

 and 1% inches deep. With tubulations for thermometer, gas regulator and for three test 

 tubes. Without burner, thermometer, or regulator 10.00 



10102. PARAFFINE BATH, round form, of polished copper, 12% inches in diameter, 3V inches deep, 

 with sheet iron base, 7% inches high. There are ten cups, seven of deep form, 2% inches 

 in diameter and 1% inches deep, and three shallow, 2% inches in diameter and % inch deep, 

 watch glass shape. With five tubulations in the top for glass tubes, and tubulations for ther- 

 mometer and gas regulator. Without burner, thermometer, or regulator 23.00 



10106. PARAFFINE BATH, Coplin, of copper, with four cups, 3 inches in diameter by 4 inches deep, 

 and one larger central reservoir 7 by 3 by 4 inches deep with stop-cock to draw off melted 

 paraffine. With three spaces in front for heating material in glass vessels, etc., valve to 

 draw off the water, a cylindrical shield for the gas flame; and with tubulations for ther- 

 mometer and gas regulator. Outside dimensions, 12x12x23 inches high, with iron stand 17 

 inches high 41.25 



10108. PARAFFINE BATH, Lewis, designed for use with either gas or alcohol lamp. The temperature 

 of the bath is maintained by a constant convection current, which enters through the tube 

 leading from the heating cylinder into the side of the bath and returns from the bottom of 

 the bath back to the heating cylinder. The temperature is easily regulated by means of the 

 stop-cock in the heating tube. This permits the use of a lower or higher temperature accord- 

 ing to the melting point of paraffine used. Made of polished copper, with three deep cups, 

 1% inches in diameter by 1% inches deep, and with two shallow cups, 1% inches in diameter 

 by % inch deep, four test tube or vial receptacles and one opening for thermometer. With- 

 out burner, thermometer, or regulator 19.80 



